Midea P6

P6 Troubleshooting
Digital display output
Description
▪ 1P6 indicates compressor A inverter module protection.
▪ 2P6 indicates compressor B inverter module protection.
▪ When a P6 error occurs, a manual system restart is required before the system can resume operation. The cause of a
P6 error should be addressed promptly in order to avoid system damage.
▪ All units stop running.
▪ Error code is displayed on the main PCB and user interface.
Possible causes
▪ Inverter module protection.
▪ DC bus low or high voltage protection.
▪ MCE error.
▪ Zero speed protection.
▪ Phase sequence error.
▪ Excessive compressor frequency variation.
▪ Actual compressor frequency differs from target frequency.
Specific error codes for xH4 inverter module protection
If a P6 error code is displayed, press button SW3 (to No.36 item) until one of the following specific error codes is displayed
on the digital display: xL0, xL1, xL2, xL4, xL5, xL7, xL8, xL9. Refer to Figure 5-4.3 and Table 5-4.1.
Figure 4-4.1: Button SW3 on main PCB

Midea P6 Specifications

General

Brand	Midea
Model	P6
Category	Microcontrollers
Language	English

Summary

P6 Troubleshooting

Specific Error Codes and LED Indicators

Lists specific error codes, their meanings, and how they are indicated by LED indicators.

Initial Troubleshooting Steps

General first step to ensure correct DC bus wire connection before specific error checks.

xL0 Troubleshooting

Detailed steps to check compressor and inverter module for xL0 error.

xL1 xL4 Troubleshooting

Steps to troubleshoot xL1/xL4 errors by checking inverter module and rectifier wiring.

xL2 Troubleshooting

Procedure to check inverter module for DC voltage issues causing xL2 error.

xL8 xL9 Troubleshooting

Troubleshooting steps for xL8/xL9 errors, involving compressor and main PCB checks.

Compressor Replacement Procedure

Detailed guide on how to remove, inspect, and replace a faulty compressor.